Anhydrous antiperspirant and deodorant compositions containing solid, encapsulated, d-pantothenate salts

ABSTRACT

Disclosed are anhydrous antiperspirant and deodorant compositions comprising from about 0.1% to about 30% by weight of an underarm active (antiperspirant and/or deodorant active); from about 0.01% to about 10% by weight of a solid, encapsulated, water-soluble, d-pantothenate salt such as calcium pantothenate; from about 0.1% to about 40% by weight of a suspending agent; and from about 10% to about 99% by weight of an anhydrous carrier liquid. Also disclosed are methods of controlling perspiration wetness and/or odor through the topical application to the underarm, especially shaven underarms, of an underarm active and a solid pantothenate salt. The anhydrous compositions are mild to the skin and can help sooth or heal skin irritated or damaged underarm skin, especially when such irritation and damage is the result of occasional or routine shaving of the underarm.

CROSS REFERENCE TO RELATED APPLICATION

[0001] This application is a continuation-in-part of U.S. applicationSer. No. 09/799,367, filed Mar. 5, 2001.

TECHNICAL FIELD

[0002] The present invention relates to anhydrous antiperspirant anddeodorant compositions that contain a solid, encapsulated,d-pantothenate salt in an anhydrous matrix. The composition providesskin health benefits such as improved wound healing and reduced skinirritation.

BACKGROUND OF THE INVENTION

[0003] Many different antiperspirant and deodorant products are knownfor use in controlling or inhibiting underarm perspiration wetness andodor. These products are available in a variety of product forms such assolid sticks, soft solids or creams, roll-on liquids and aerosol ornon-aerosol sprays. Most of these products, however, are similar inhaving a base formula that contains an antiperspirant active such as analuminum and or zirconium salt, a suspending or thickening agent, and asuitable liquid carrier.

[0004] Antiperspirant and deodorant products can be formulated tocontain materials to help sooth or minimize irritation of the underarmskin, especially in those consumers that shave their underarms and applyantiperspirant and deodorant products to the shaved area. The shavingprocess can irritate and damage the underarm skin, and it is for thatreason that antiperspirant and deodorant products are occasionallyformulated with materials such as aloe, allantoin, and panthenoic acidand related materials, to minimize or heal such skin irritation and skindamage. It is well known that pantothenic acid and similar othermaterials can be used as wound healing agents in a variety of personalcare products, including antiperspirant and deodorant products.

[0005] Pantothenic acid and related materials can be formulated with anaqueous antiperspirant or deodorant active to provide wound healing andskin soothing benefits to the applied area of the skin. Examples ofthese skin soothing materials include pantothenic acid and pantothenicderivatives and salts such as d-panthenol, dl-panthenol, andpantothenate salts such as calcium pantothenate. The pantothenate saltsare especially useful in providing wound healing and skin soothingbenefits, even in combination with antiperspirant and deodorant actives.These highly preferred pantothenate salts are formulated into either ananhydrous or aqueous antiperspirant product matrix, wherein the saltsare solubilized within the product matrix by water or other solvents.The product matrix containing the solubilized salts is then applied tothe desired area of the skin so that the solubilized salts are allowedto spread or flow over the applied surface, thus helping to sooth orheal any irritated areas of the skin within the applied area.

[0006] It has now been found that anhydrous antiperspirant and deodorantproducts can be formulated with pantothenate salts as solid dispersedparticulates, and still provide a soothing and healing effect on theunderarm area of the skin, especially underarm skin that has beenirritated or damaged by shaving. It is believed that the solidpantothenate salts are readily dissolved by the sweat or other moistureon the underarm, thus allowing the solids to dissolve after application.Once the product matrix is applied to the underarm area, the solidpantothenate salts dissolve in the sweat or other moisture on the skinand then flow or spread onto the applied surface of the underarm, thushelping to sooth, heal or mitigate any skin irritation or woundsassociated with the underarm, especially skin wounds or irritationcaused by shaving the underarm. It is also believed that by delayingdissolution of the pantothenate salts until after product application,that these solid particulates are then less likely than their dissolvedcounterparts to interact with other materials in the product matrixprior to application, including interaction with aluminum and zirconiumantiperspirant actives or deodorant actives in the product matrix priorto application.

[0007] It has also been found that the pantothenate salts can bereactive during processing and storage with the antiperspirant active orother ingredients in the compositions. To minimize this type ofreaction, it has been found that the pantothenate salts can beencapsulated or otherwise substantially isolated from the antiperspirantactive or other reactive ingredient with the composition. Encapsulationor isolation can be accomplished by any encapsulation material or methodknown for or otherwise suitable for use with personal care products.

[0008] It therefore an object of the present invention to provide newanhydrous antiperspirant and deodorant compositions that containmaterials to sooth or heal irritated underarm skin, especially underarmskin that has been irritated or damaged by shaving. It is a furtherobject of the present invention to provide such a composition thatcontains solid pantothenate salts, especially solid calcium pantothenatesalts, as dispersed particulates in an anhydrous antiperspirant anddeodorant matrix.

SUMMARY OF THE INVENTION

[0009] The present invention is directed to anhydrous antiperspirant anddeodorant compositions that comprise from about 0.1% to about 30% byweight of an antiperspirant or deodorant active; from about 0.01% toabout 10% by weight of a solid, encapsulated, water-soluble,d-pantothenate salt; from about 0.1% to about 40% by weight of asuspending agent; and from about 10% to about 99% by weight of ananhydrous carrier liquid. The anhydrous antiperspirant and deodorantcompositions are mild to the skin and provide skin soothing or healingbenefits, especially when applied to the underarm after shaving.

[0010] It has been found that the d-pantothenate salts can be formulatedas solid particulates in an anhydrous antiperspirant or deodorantcomposition, and still provide excellent skin soothing and healingbenefits to the underarm. It is believed that the solid d-pantothenatesalts help to minimize ingredient incompatibilities associated with theuse of dissolved pantothenate salts in antiperspirant and deodorantproducts.

DETAILED DESCRIPTION OF THE INVENTION

[0011] The anhydrous antiperspirant and deodorant compositions of thepresent invention comprise as essential components an antiperspirant ordeodorant active, a solid d-pantothenate salt, a suspending agent, andan anhydrous liquid carrier. Each of these essential components of thepresent invention is described hereinafter in more detail.

[0012] The term “anhydrous” as used herein means that the antiperspirantand deodorant compositions of the present invention, and the essentialor optional components thereof, are substantially free of added or freewater. From a formulation standpoint, this means that the anhydrousantiperspirant and deodorant compositions of the present inventionpreferably contain less than about 5%, more preferably less than about3%, even more preferably less than about 1%, most preferably zeropercent, by weight of free or added water, other than the water ofhydration typically associated with any particulate solids prior toformulation.

[0013] All melting point values referenced herein, unless otherwisespecified, are measured and determined according to well knownDifferential Scanning Calorimetry (DSC) technique. Examples of DSCtechnique for determining melting point values of various materials aredescribed in U.S. Pat. No. 5,306,514 (Letton et al.), which descriptionis incorporated herein by reference.

[0014] The term “ambient conditions” as used herein refers tosurrounding conditions under about one (1) atmosphere of pressure, atabout 50% relative humidity, and at about 25° C., unless otherwisespecified. All values, amounts and measurements described herein areobtained under ambient conditions unless otherwise specified.

[0015] The term “volatile” as used herein refers to those materials thathave a measurable vapor pressure at 25° C. Such vapor pressures willtypically range from about 0.01 mmHg to about 6 mmHg, more typicallyfrom about 0.02 mmHg to about 1.5 mmHg, and have an average boilingpoint at one (1) atmosphere of pressure (atm) of less than about 250°C., more typically less than about 235° C. at one (1) atm. Conversely,the term “non volatile” refers to those materials that are not“volatile” as defined herein.

[0016] The term “skin temperature” as used herein refers to thetemperature of the axilla area of the skin, which is generally at orslightly below a typical body temperature of about 37° C.

[0017] The term “water-soluble” as used herein refers to thosematerials, including the water-soluble skin active agent as describedherein, that can be dissolved in deionized water at 37° C. underotherwise ambient conditions to form an aqueous solution containing atleast 0.1% by weight of the dissolved material, preferably at leastabout 0.5% by weight of the dissolved material.

[0018] The anhydrous antiperspirant and deodorant compositions of thepresent invention can comprise, consist of, or consist essentially ofthe essential elements and limitations of the invention describedherein, as well as any additional or optional ingredients, components,or limitations known or otherwise effective for use in suchcompositions.

[0019] All percentages, parts and ratios are by weight of the totalcomposition, unless otherwise specified. All such weights as theypertain to listed ingredients are based on the specific ingredient leveland, therefore, do not include solvents, carriers, by-products, filleror other minor ingredients that may be included in commerciallyavailable materials, unless otherwise specified.

[0020] Antiperspirant Active

[0021] The anhydrous antiperspirant and deodorant compositions of thepresent invention comprise an underarm active suitable for applicationto human skin. The concentration of the underarm active, which can beeither an antiperspirant and or deodorant active, should be sufficientto provide the desired perspiration wetness or odor control from theanhydrous formulation selected.

[0022] The anhydrous antiperspirant embodiments of the present inventionpreferably comprise antiperspirant active at concentrations ranging fromabout 0.1% to about 30%, more preferably from about 5% to about 30%, byweight of the composition. These weight percentages are calculated on ananhydrous metal salt basis exclusive of water and any complexing agentssuch as glycine, glycine salts, or other complexing agents. Theantiperspirant active can be solubilized or solid, preferably asdispersed solid particulates. The antiperspirant active as formulated inthe composition is preferably in the form of dispersed particulatesolids having a preferred average particle size or diameter of less thanabout 100 μm, preferably from about 1 μm to about 40 μm.

[0023] The antiperspirant active for use in the anhydrous antiperspirantembodiments of the present invention include any compound, compositionor other material having antiperspirant activity. Preferredantiperspirant actives include astringent metallic salts, especiallyinorganic and organic salts of aluminum, zirconium and zinc, as well asmixtures thereof. Particularly preferred are aluminum-containing and/orzirconium-containing salts or materials, such as aluminum halides,aluminum chlorohydrate, aluminum hydroxyhalides, zirconyl oxyhalides,zirconyl hydroxyhalides, and mixtures thereof.

[0024] Preferred aluminum salts for use in the anhydrous antiperspirantembodiments of the present invention include those which conform to theformula:

Al₂(OH)_(a)Cl_(b) .xH₂O

[0025] wherein a is from about 2 to about 5; the sum of a and b is about6; x is from about 1 to about 6; and wherein a, b, and x may havenon-integer values. Particularly preferred are the aluminumchlorohydroxides referred to as “⅚ basic chlorohydroxide”, wherein a=5,and “⅔ basic chlorohydroxide”, wherein a=4. Processes for preparingaluminum salts are disclosed in U.S. Pat. No. 3,887,692, Gilman, issuedJun. 3, 1975; U.S. Pat. No. 3,904,741, Jones et al., issued Sep. 9,1975; U.S. Pat. No. 4,359,456, Gosling et al., issued Nov. 16, 1982; andBritish Patent Specification 2,048,229, Fitzgerald et al., publishedDec. 10, 1980, all of which are incorporated herein by reference.Mixtures of aluminum salts are described in British Patent Specification1,347,950, Shin et al., published Feb. 27, 1974, which description isalso incorporated herein by reference.

[0026] Preferred zirconium salts for use in the anhydrous antiperspirantembodiments of the present invention include those which conform to theformula:

ZrO(OH)_(2−a)Cl_(a) .xH₂O

[0027] wherein a is from about 1.5 to about 1.87; x is from about 1 toabout 7; and wherein a and x may both have non-integer values. Thesezirconium salts are described in Belgian Patent 825,146, Schmitz, issuedAug. 4, 1975, which description is incorporated herein by reference.Particularly preferred zirconium salts are those complexes whichadditionally contain aluminum and glycine, commonly known as ZAGcomplexes. These ZAG complexes contain aluminum chlorohydroxide andzirconyl hydroxy chloride conforming to the above described formulas.Such ZAG complexes are described in U.S. Pat. No. 3,679,068, Luedders etal., issued Feb. 12, 1974; Great Britain Patent Application 2,144,992,Callaghan et al., published Mar. 20, 1985; and U.S. Pat. No. 4,120,948,Shelton, issued Oct. 17, 1978, all of which are incorporated herein byreference.

[0028] Antiperspirant actives suitable for use in the compositionsinclude aluminum chlorohydrate, aluminum dichlorohydrate, aluminumsesquichlorohydrate, aluminum chlorohydrex propylene glycol complex,aluminum dichlorohydrex propylene glycol complex, aluminumsesquichlorohydrex propylene glycol complex, aluminum chlorohydrexpolyethylene glycol complex, aluminum dichlorohydrex polyethylene glycolcomplex, aluminum sesquichlorohydrex polyethylene glycol complex,aluminum zirconium trichlorohydrate, aluminum zirconiumtetrachlorohydrate, aluminum zirconium pentatchlorohydrate, aluminumzirconium octachlorohydrate, aluminum zirconium trichlorohydrex glycinecomplex, aluminum zirconium tetrachlorohydrex glycine complex, aluminumzirconium pentachlorohydrex glycine complex, aluminum zirconiumoctachlorohydrex glycine complex, aluminum chloride, aluminum sulfatebuffered, and combinations thereof.

[0029] Antimicrobial Deodorant Active

[0030] The antiperspirant and deodorant compositions of the presentinvention can also be formulated with an underarm active in the form ofan antimicrobial deodorant material in addition to or in place of theantiperspirant active. Deodorant active concentrations in thecompositions can range from about 0.1% to about 30%, preferably fromabout 0.1% to about 10%, even more preferably from about 0.1% to about3%, by weight of the composition. These deodorant actives include anyknown or otherwise safe and effective antimicrobial deodorant activesuitable for topical application to human skin, and which is effectivein preventing or eliminating malodor associated with perspiration.

[0031] Non-limiting examples of preferred antimicrobial deodorantactives for use in the antiperspirant and deodorant compositions of thepresent invention include cetyltrimethylammonium bromide, cetylpyridinium chloride, benzethonium chloride, diisobutyl phenoxy ethoxyethyl dimethyl benzyl ammonium chloride, sodium N-lauryl sarcosine,sodium N-palmethyl sarcosine, lauroyl sarcosine, N-myristoyl glycine,potassium N-lauryl sarcosine, trimethyl ammonium chloride, sodiumaluminum chlorohydroxy lactate, triethyl citrate, tricetylmethylammonium chloride, 2,4,4′-trichlorio-2′-hydroxy diphenyl ether(triclosan), 3,4,4′-trichlorocarbanilide (triclocarban), diaminoalkylamides such as L-lysine hexadecyl amide, heavy metal salts of citrate,salicylate, and piroctose, especially zinc salts, and acids thereof,heavy metal salts of pyrithione, especially zinc pyrithione, zincphenolsulfate, farnesol, and combinations thereof. Preferred aretriclosan, triclocarban, and combinations thereof.

[0032] Other deodorant actives suitable for use herein are described inU.S. Pat. No. 6,013,248 (Luebbe et al.), which descriptions areincorporated herein by reference.

[0033] D-Pantothenate Salts

[0034] The anhydrous antiperspirant compositions of the presentinvention comprise a solid particulate that is suspended or otherwisedispersed throughout the compositions, wherein the solid particulate isa water-soluble, encapsulated d-pantothenate salt that is in solidparticulate form within the composition. The solid d-pantothenate saltsfor use in the antiperspirant and deodorant compositions of the presentinvention can include any salt of d-pantothenic acid or any salt ofd-pantothenic acid derivatives, provided that the d-pantothenate salt isin solid particulate form within the composition.

[0035] The d-pantothenate salts for use in the antiperspirant anddeodorant compositions of the present invention are encapsulated withinthe composition. Any encapsulation material or method known or otherwisesuitable for encapsulating or substantially isolating the d-pantothenatesalt from other reactive ingredients in the composition can be used. Anyencapsulating or isolating material or method know for or otherwisesuitable for use with personal care ingredients can be used to providethe desired encapsulation of the d-pantothenate salts within thecompositions.

[0036] It has been found that d-pantothenate salts can react whenformulated in the presence of an antiperspirant active ingredient, mosttypically aluminum-containing antiperspirant actives, as describedherein. Encapsulation helps protect the d-pantothenate salts fromreacting with the antiperspirant active during processing and storage,but should then allow for the release of the salts from the productmatrix at the appropriate time after topical application to theunderarm. This active release is most useful when activated by eventssuch as moisture or sweat contact, or shear application of the productmatrix onto the underarm.

[0037] Preferred encapsulation materials or methods include starchencapsulation, although many other encapulation materials or methods canalso be used. Encapsulation materials include various proteins,gelatines, caseinates, hydrocolloides, dextrines and maltodextrines,starch and modified starch, sugars, agar, or any other knownencapsulation material.

[0038] The concentration of solid d-pantothenate salt, excludingencapsulation materials, ranges from about 0.01% to about 10%,preferably from about 0.05% to about 5%, more preferably from about 0.1%to about 1.0%, by weight of the compositions.

[0039] The d-pantothenate salt for use in the anhydrous compositions ofthe present invention must be in solid particulate form within thecomposition under ambient conditions, and must also be water-soluble asdefined herein. These solid particulates within the compositionpreferably have an average particle diameter of from about 3 μm to about100 μm, more preferably from about 5 μm to about 40 μm.

[0040] The d-pantothenate salts may be obtained and used in their pured-enantomeric form, or may be used as part of a d-l racemic mixture,although it is believed that most or all of the skin soothing andhealing benefits made possible by these materials is derived from thed-enantomer rather than from the relatively inactive l-enantomer.

[0041] Preferred pantothenate salts for use in the anhydrousantiperspirant and deodorant compositions of the present inventioninclude sodium salts, potassium salts, calcium salts, magnesium salts,lithium salts, and combinations thereof. Most preferred is calciumpantothenate.

[0042] Suspending Agent

[0043] The anhydrous antiperspirant and deodorant compositions of thepresent invention comprise a solid suspending or thickening agent tohelp provide the compositions with the desired viscosity, rheology,texture and/or product hardness, or to otherwise help suspend anydispersed solids or liquids within the composition.

[0044] The term “suspending agent” as used herein, unless otherwisespecified, means any material known or otherwise effective in providingsuspending, gelling, viscosifying, solidifying and/or thickeningproperties to the composition or which otherwise provide structure tothe final product form. These suspending agents include gelling agents,and polymeric or nonpolymeric or inorganic thickening or viscosifyingagents. Such materials will typically be solids under ambient conditionsand include organic solids, silicone solids, crystalline or othergellants, inorganic particulates such as clays or silicas, orcombinations thereof.

[0045] The concentration and type of suspending agent selected for usein the antiperspirant and deodorant compositions will vary dependingupon the desired product hardness, rheology, formulation (e.g.,antiperspirant formulation or deodorant formulation) and/or otherrelated product characteristics. For most suspending agents suitable foruse herein, the total suspending agent concentration ranges from about0.1% to about 40%, more typically from about 0.1% to about 35%, byweight of the composition. Suspending agent concentrations will tend tobe lower for liquid embodiments (e.g., aerosols, roll-ons, etc) andhigher for semi-solid (e.g., soft solids or creams) or solid stickembodiments.

[0046] Non limiting examples of suitable suspending agents includehydrogenated castor oil (e.g., Castorwax MP80, Castor Wax, etc.), fattyalcohols (e.g., stearyl alcohol), solid paraffins, triglycerides andother similar solid suspending esters or other microcrystalline waxes,silicone and modified silicone waxes. Non limiting examples of optionalsuspending agents suitable for use herein are described in U.S. Pat. No.5,976,514 (Guskey et al.), U.S. Pat. No. 5,891,424 (Bretzler et al.),which descriptions are incorporated herein by reference.

[0047] Other suitable suspending agents include silicone elastomers atconcentrations ranging from about 0.1% to about 10%, by weight of thecomposition. Non-limiting examples of such silicone elastomer materialssuitable for use as a suspending agent herein are described in U.S. Pat.No. 5,654,362 (Schulz, Jr. et al.); U.S. Pat. No. 6,060,546 (Powell etal.) and U.S. Pat. No. 5,919,437 (Lee et al.), which descriptions areincorporated herein by reference.

[0048] Non-limiting examples of suitable suspending agents for use indeodorant embodiments of the present invention include fatty acid saltssuch as sodium stearate and other similar materials as described in U.S.Pat. No. 6,013,248 (Luebbe et al.), which description is incorporatedherein by reference.

[0049] Anhydrous Carrier Liquid

[0050] The anhydrous antiperspirant and deodorant compositions of thepresent invention comprise an anhydrous carrier liquid at concentrationsranging from about 10% to about 99%, preferably from about 20% to about70%, by weight of the composition. Such concentrations will varydepending upon variables such as product form, desired product hardness,selection of other ingredients in the composition, and so forth. Theanhydrous carrier liquid for use in the composition can be any anhydrousliquid that is known for use in personal care applications or isotherwise suitable for topical application to the skin.

[0051] The anhydrous carrier liquid preferably comprises a volatilesilicone liquid, which may include cyclic, linear and/or branched chainsilicones. The concentration of volatile silicone in the antiperspirantcomposition of the present invention preferably ranges from about 5% toabout 80%, preferably from about 20% to about 60%, more preferably fromabout 30% to about 60%, by weight of the composition. The volatilesilicone is preferably a cyclic silicone having from about 3 to about 7,more preferably from about 5 to about 6, silicon atoms. Most preferredare those that conform to the formula:

[0052] wherein n is from about 3 to about 7, preferably from about 5 toabout 6, most preferably 5. These volatile cyclic silicones generallyhave a viscosity of less than about 10 centistokes. Suitable volatilesilicones for use herein include, but are not limited to, CyclomethiconeD5 (commercially available from G. E. Silicones); Dow Corning 344, andDow Corning 345 (commercially available from Dow Corning Corp.); and GE7207, GE 7158 and Silicone Fluids SF-1202 and SF-1173 (available fromGeneral Electric Co.). Non limiting examples of suitable volatilesilicones are described in Todd et al., “Volatile Silicone Fluids forCosmetics”, Cosmetics and Toiletries, 91:27-32 (1976), whichdescriptions are incorporated herein by reference.

[0053] The anhydrous liquid carrier may comprise a non-volatile siliconeliquid, preferred concentrations of which range from about 1% to about35%, more preferably from about 5% to about 30%, by weight of thecomposition. The non volatile silicone carrier is preferably a liquid ator below human skin temperature, or otherwise in liquid form within theanhydrous antiperspirant composition during or shortly after topicalapplication. Preferred are those nonvolatile liquid silicones thatconform to either of the formulas:

[0054] wherein n is sufficiently large to provide a viscosity of up toabout 100,000 centistokes, preferably less than about 500 centistoke,more preferably from 10 centistoke to about 200 centistoke, even morepreferably from 10 centistoke to about 50 centistoke, as measured underambient conditions. Specific non limiting examples of suitable nonvolatile, linear, silicone carriers include Dow Corning 200,hexamethyldisiloxane, Dow Corning 225, Down Corning 1732, Dow Corning5732, Dow Corning 5750 (available from Dow Corning Corp.); and SF-96,SF-1066 and SF18(350) Silicone Fluids (available from G. E. Silicones).

[0055] Many other carrier liquids known for use in personal careproducts can be used in the antiperspirant compositions, alone or incombination with the carrier liquids described in more detail herein.Many such other carrier liquids are disclosed in U.S. Pat. No. 6,013,248(Luebbe et al.) and U.S. Pat. No. 5,968,489 (Swaile et al.), whichdescriptions are incorporated herein by reference.

[0056] Optional Ingredients

[0057] The anhydrous antiperspirant and deodorant compositions of thepresent invention may further comprise any optional ingredient that isknown for use in antiperspirants and deodorant products or otherpersonal care products, or which is otherwise suitable for topicalapplication to human skin.

[0058] Non limiting examples of optional ingredients include dyes orcolorants, emulsifiers, perfumes, propellants, deodorant perfumes,preservatives, vitamins, non-vitamin nutrients, emollients, couplingagents or other solvents, surfactants, processing aides such asviscosity modifiers, wash-off aids, and so forth. Examples of suchoptional materials are described in U.S. Pat. No. 4,049,792 (Elsnau);U.S. Pat. No. 5,019,375 (Tanner et al.); and U.S. Pat. No. 5,429,816(Hofrichter et al.); which descriptions are incorporated herein byreference.

[0059] Methods of Manufacture

[0060] The anhydrous antiperspirant and deodorant compositions of thepresent invention may be prepared by any known or otherwise effectivetechnique suitable for formulating the desired antiperspirant ordeodorant product form.

[0061] Antiperspirant solid and semi-solid embodiments of presentinvention can be formulated, for example, by mixing volatile andnonvolatile silicone carrier liquids (or any other desired anhydrouscarrier liquid) under ambient conditions, or under conditions sufficientto render the admixture fluid or liquid, and then adding any suspendingagents to the mixture and heating the resulting mixture sufficiently toliquefy the added suspending agents, e.g., approximately 85° C. for manywax solids, and form a single phase liquid. Antiperspirant active andother water-soluble solids (e.g. solid pantothenate salts) are thentypically added to and dispersed throughout the heated, single-phaseliquid before allowing the resulting combination to cool toapproximately 78° C., at which point perfumes and similar othermaterials (if any) are mixed into the combination, which is then cooledto just above the solidification point of the suspending agent (e.g.,typically about 60° C.) and then poured into dispensing packages andallowed to solidify under ambient conditions.

[0062] Antiperspirant liquid embodiments of the present invention can beformulated, for example, by combining an anhydrous carrier liquid with asuitable suspending agent and activator for the suspending agent andallowing the combination to thicken to the desired viscosity beforeadding the antiperspirant active and other water-soluble solids withagitation. The resulting mixture is subjected to shear in a suitablehomogenizer to achieve the desired concentrate viscosity. For aerosolliquid embodiments, the resulting liquid is then packaged into aerosolcontainers with an appropriate propellant in a concentrate to propellantratio suitable for the propellant system selected.

[0063] Other suitable methods of making antiperspirant compositions areknown and described in the antiperspirant art, and can be used to makethe antiperspirant compositions of the present inventions. For solidantiperspirant embodiments, such methods include those described in U.S.Pat. No. 4,822,603 (Farris et al.) and U.S. Pat. No. 4,985,238 (Tanneret al.). For aerosol antiperspirant embodiments, such methods includethose described in U.S. Pat. No. 6,136,303 (Ruebusch et al.); U.S. Pat.Nos. 4,904,463 and 4,840,786 (Johnson et al.) For soft solid or creamembodiments, such methods are described in U.S. Pat. No. 5,902,571(Putman et al.) and U.S. Pat. No. 5,902,570 (Bretzler et al.). All suchmethod descriptions in the above-identified patent publications areincorporated herein by reference.

[0064] Suitable methods of making deodorant embodiments of the presentinvention are described, for example, in U.S. Pat. Nos. 6,013,248 and5,902,572 (Luebbe et al.), which descriptions are incorporated herein byreference.

[0065] Preferred Manufacturing Method

[0066] The anhydrous antiperspirant and deodorant compositions of thepresent invention are preferably manufactured by subjecting thecomposition to a milling step to reduce or eliminate relatively largesolid agglomerates that can form when the solid pantothenate salts arecombined with an antiperspirant or deodorant active in solid particulateform.

[0067] It has also been found that the solid pantothenate salts tends toagglomerate with any solid antiperspirant or deodorant active,especially antiperspirant active, to form undesirably large agglomeratedsolids within the composition. It has also been found that by millingthe intermediate formulation prior to pouring the formulations intopackages to cool, that the agglomerates can be reduced or eliminated,thus further improving the application cosmetics of the anhydrousantiperspirant and deodorant compositions.

[0068] More specifically, the preferred manufacturing method of thepresent invention comprises the steps of:

[0069] (a) preparing an intermediate composition by mixing together thefollowing components:

[0070] (i) from about 0.1% to about 30% by weight of an antiperspirantor deodorant active;

[0071] (ii) from about 0.01% to about 10% by weight of a solid,water-soluble, pantothenate salt;

[0072] (iii) from about 0.1% to about 40% by weight of a suspendingagent; and

[0073] (iv) from about 10% to about 99% by weight of an anhydrouscarrier liquid; and

[0074] (b) heating the intermediate composition to above the meltingpoint of the suspending agent to form a liquid intermediate compositioncontaining solid antiperspirant active and solid, water-soluble,pantothenate salt, and solid aggregates thereof;

[0075] (c) milling the liquid intermediate composition for a period oftime sufficient to reduce the average particle diameter of the solidaggregates to less than 50 μm; and then

[0076] (d) pouring the milled liquid intermediate into a dispensingpackage and allowing the packaged composition to cool to ambienttemperatures, to form an anhydrous antiperspirant and deodorantcomposition.

[0077] The milling step as referred to herein is any process wherein ashear force is applied that effectively breaks up or reduces anyagglomeration of particles and disperses the particles throughout thecomposition. Non limiting examples of such milling or high shearingmixing processes include colloid milling, high pressure homogenization.The average particle diameter of the solid aggregates after the millingstep can be measured or otherwise determined by polarized lightmicroscopy methods well known in the various chemical arts.

[0078] The encapsulated d-pantothenate salt is preferably prepared usinga modified food starch (e.g., National Starch brand Capsule®). Thestarch is dissolved in water at 160° F. to form a 30% solution, and thenallowed to cool to room temperature. Calcium pantothenate is then addedto the cooled solution at a 3:1 weight ratio of starch to calciumpantothenate to achieve a capsule loading of 25%, which is then spraydried using a Buchi lab model spray drier at in inlet air temperature of200° C. and an outlet air temperature of 100° C. The spray dried productis collected in a collection cyclone and forms a preferred encapsulatedpantothenate salt for use in the compositions herein. It is thenincorporated into the compositions of the present invention.

[0079] Method of Use

[0080] The anhydrous antiperspirant and deodorant compositions of thepresent invention may be applied topically to the axilla or other areaof the skin in an amount effective to treat or reduce perspirationwetness and or malodor. The composition is preferably applied in anamount ranging from about 0.1 gram to about 20 grams, more preferablyfrom about 0.1 gram to about 10 grams, even more preferably from about0.1 gram to about 1 gram, to the desired area of the skin. Thecompositions are preferably applied one to two times daily, preferablyonce daily, to achieve effective antiperspirant and malodor control.

[0081] The anhydrous antiperspirant and deodorant compositions of thepresent invention can be formulated in a variety of product forms andthen applied to the axilla or other area of the skin in the mannerdescribed herein, such variety product forms including solids (e.g.,sticks), semi-solids (e.g., lotions, creams, soft solids), or liquids(e.g. aerosols, non-aerosol sprays, roll-ons, porous dome liquids).

EXAMPLES

[0082] The following non-limiting examples described in Tables 1-5illustrate specific embodiments of the anhydrous antiperspirant anddeodorant compositions of the present invention, including methods ofmanufacture and use. Each of the exemplified compositions is appliedtopically to the axilla area of the skin, in accordance with the methodsof use described herein, including the application to shaved underarms.The applied compositions are mild to the skin and help heal or soothirritated underarm skin, including underarms skin that has been shaven.

[0083] All exemplified amounts are weight percentages based upon thetotal weight of the antiperspirant stick composition, unless otherwisespecified.

Examples 1-3 Antiperspirant Soft Solids/Creams, Wax Sticks, Low ResidueSticks

[0084] The Tables 1-3 examples are each prepared as follows. First, thegellants (fully hydrogenated HEAR and C18-C36 acid triglyceride) aredissolved into the silicone liquids, cyclopentasiloxane and dimethicone,by heating the gellants and silicone materials together while stirringon an IKA stir plate to 85° C. The solid antiperspirant active is thenadded slowly with agitation to the heated mixture, and once added, theresulting mixture is allowed to reheat to 85° C. At this point all ofthe encapsulated pantothenate salts and other any remaining watersoluble solids (e.g., niacinamide) are added along with any tocopherolacetate. The mixture is milled at 4 on the speed setting using an IKAbrand T 25 Ultra-Turrax disperser using the S 25 N-25F attachment. Theproduct is milled for a period of time sufficient to reduce and break upany agglomerates of solid water-soluble solids and or solidantiperspirant active. To measure when sufficient milling has occurred,a small sample of milled product is withdrawn from the hot mixture on ametal spatula and examined under a polarizing microscope. Product ismilled until no visible agglomerates greater than 10 microns ofwater-soluble solids and or antiperspirant active are evident. Oncemilling is completed, then the product is cooled and poured atapproximately 60° C. into antiperspirant containers, where it is allowedto cool to ambient temperatures to the desired product form. TABLE 1Antiperspirant Soft Solids/Creams Ex. Ex. Ex. Ex. Ex. Ingredients 1.11.2 1.3 1.4 1.5 Al Zr Trichlorohydrex 25.25 25.25 25.25 25.25 25.25Glycinate (solid) Dimethicone (10 cs) 5.00 5.00 5.00 5.00 5.00 FullyHydrogenated High 5.00 5.00 5.00 5.00 5.00 Erucic Acid Rapeseed oil(HEAR oil) Niacinamide (solid) 3.50 3.50 0 7.00 7.00 C-18-36 AcidTriglyceride 1.25 1.25 1.25 1.25 1.25 Syncrowax HGLC Perfume 0.75 0.750.75 0.75 0.75 Starch encapsulated calcium 2.00 2.00 14.00 4.00 6.0Pantothenate (25% loading) Tocopherol Acetate 0.50 0 0 0 0Cyclopentasiloxane QS QS QS QS QS Total 100 100 100 100 100

[0085] TABLE 2 Antiperspirant Wax Sticks (Solid) Ex. Ex. Ex. Ex. Ex.Ingredients 2.1 2.2 2.3 2.4 2.5 Al Zr Trichlorohydrex Gly.(solid) 20.0020.00 20.00 20.00 20.00 Stearyl Alcohol 11.00 11.00 11.00 11.00 11.00Talc, USP Grade 6.50 7.00 7.50 3.00 3.00 Niacinamide (solid) 3.50 3.50 07.00 7.00 Dimethicone (50 cs) 3.00 5.00 5.00 5.00 5.00 Castor Wax 2.905.00 5.00 5.00 5.00 Starch encapsulated calcium 2.00 2.00 14.00 4.00 6.0pantothenate (25% loading) Tocopherol Acetate 0.50 0 0 0 0 Fumed Silica0.18 0.18 0.18 0.18 0.18 Dipropylene Glycol 0.18 0.18 0.18 0.18 0.18Microthene 0.18 0.18 0.18 0.18 0.18 Behenyl Alcohol 0.08 0.08 0.08 0.080.08 Perfume 0.75 0.75 0.75 0.75 0.75 Cyclopentasiloxane QS QS QS QS QSTotal 100 100 100 100 100

[0086] TABLE 3 Antiperspirant Low Sticks (Solid) Residue Ex. Ex. Ex. Ex.Ex. Ingredients 3.1 3.2 3.3 3.4 3.5 Al Zr Trichlorohydrex 25.25 20.0020.00 20.00 20.00 Glycinate (solid) Dimethicone (50 cs) 5.00 5.00 5.005.00 5.00 Fully Hydrogenated High 15.00 15.00 15.00 15.00 15.00 ErucicAcid Rapeseed oil (HEAR oil) Isopar M 10.00 10.00 10.00 10.00 10.00Niacinamide (solid) 3.50 3.50 0 7.00 7.00 C-18-36 Acid Triglyceride 3.753.75 3.75 3.75 3.75 Syncrowax HGLC Perfume 0.75 0.75 0.75 0.75 0.75Starch encapsulated calcium 2.00 2.00 14.00 4.00 6.0 pantothenate (25%loading) Tocopherol Acetate 0.50 0 0 0 0 Cyclopentasiloxane QS QS QS QSQS Total 100 100 100 100 100

What is claimed is:
 1. Anhydrous antiperspirant and deodorantcompositions comprising: (a) from about 0.1% to about 30% by weight ofan underarm active; (b) from about 0.01% to about 10% by weight of asolid, encapsulated, water-soluble, d-pantothenate salt; (c) from about0.1% to about 40% by weight of a suspending agent; and (d) from about10% to about 99% by weight of an anhydrous carrier liquid.
 2. Ananhydrous composition according to claim 1, wherein the d-pantothenatesalt is selected from the group consisting of calcium salts, sodiumsalts, potassium salts, magnesium salts, zinc salts, and combinationsthereof.
 3. An anhydrous composition according to claim 1, wherein thed-pantothenate salt is calcium pantothenate.
 4. An anhydrous compositionaccording to claim 2, wherein the d-pantothenate salt represents fromabout 0.1% to about 5%, by weight of the composition.
 5. An anhydrouscomposition according to claim 2, wherein the composition contains lessthan 1% by weight of free or added water.
 6. An anhydrous compositionaccording to claim 2, wherein the underarm active comprises a solidantiperspirant active selected from the group consisting ofzirconium-containing active, aluminum-containing active, andcombinations thereof, and wherein the solid antiperspirant activerepresents from about 5% to about 30% by weight of the anhydrouscomposition.
 7. An anhydrous composition according to claim 2, whereinthe underarm active comprises an antimicrobial deodorant active, andwherein the antimicrobial deodorant active represents from about 0.1% toabout 5% by weight of the composition.
 8. An anhydrous compositionaccording to claim 2, wherein the antimicrobial active is selected fromthe group consisting of triclosan, triclocarban, and combinationsthereof.
 9. An anhydrous composition according to claim 2, wherein theanhydrous carrier comprises a volatile cyclomethicone that representsfrom about 5% to about 80% by weight of the composition.
 10. Ananhydrous composition according to claim 9, wherein the anhydrouscarrier further comprises a non-volatile silicone liquid that representsfrom about 1% to about 35% by weight of the composition.
 11. Ananhydrous antiperspirant composition according to claim 2, wherein theaverage particle diameter of the d-pantothenate salt particulates isfrom about 3 μm to about 100 μm.
 12. An anhydrous antiperspirantcomposition according to claim 2, wherein the average particle diameterof the d-pantothenate salt particulates is from about 5 μm to about 40μm.
 13. An anhydrous antiperspirant composition according to claim 2,wherein the pantothenate salt is starch encapsulated.
 14. A method ofcontrolling underarm perspiration wetness or odor, said methodcomprising the topical application to the underarm of from about 0.1grams to about 20 grams per underarm of a composition according to claim2.
 15. A method according to claim 14, wherein the composition isapplied to a shaven underarm.
 16. A method of making anhydrousantiperspirant and deodorant compositions, said method comprising thesteps of (a) preparing an intermediate composition by mixing togetherthe following components: (i) from about 0.1% to about 30% by weight ofa solid, antiperspirant or deodorant active; (ii) from about 0.01% toabout 20% by weight of a solid, encapsulated, pantothenate salt; (iii)from about 0.1% to about 40% by weight of a suspending agent; and (iv)from about 10% to about 99% by weight of an anhydrous carrier liquidthat is substantially free of nonvolatile organic liquids having a C logP value greater than about 7.0; (b) heating the intermediatedcomposition to form a liquid intermediate composition containing solidantiperspirant active and solid, water-soluble, skin active agent, andsolid aggregates thereof; (c) milling the liquid intermediatecomposition for a period of time sufficient to reduce the averageparticle diameter of the solid aggregates to less than 50 μm; and then(d) pouring the milled liquid intermediate into a dispensing package andallowing the packaged composition to cool to ambient temperatures, toform an anhydrous antiperspirant and deodorant composition.
 17. Themethod of claim 16, wherein the solid d-pantothenate salt is selectedfrom the group consisting of calcium salts, sodium salts, potassiumsalts, magnesium salts, zinc salts, and combinations thereof.
 18. Themethod of claim 17, wherein the solid d-pantothenate salt comprisescalcium pantothenate, and wherein the calcium pantothenate saltrepresents from about 0.1% to about 5%, by weight of the composition.19. The method of claim 18, wherein the pantothenate salt is starchencapsulated.
 20. The method of claim 16, wherein the anhydrousantiperspirant and deodorant composition contains less than about 1% byweight of free or added water.
 21. The method of claim 20 wherein theantiperspirant or deodorant active is selected from the group consistingof aluminum chlorohydrate, aluminum dichlorohydrate, aluminumsesquichlorohydrate, aluminum chlorohydrex propylene glycol complex,aluminum dichlorohydrex propylene glycol complex, aluminumsesquichlorohydrex propylene glycol complex, aluminum chlorohydrexpolyethylene glycol complex, aluminum dichlorohydrex polyethylene glycolcomplex, aluminum sesquichlorohydrex polyethylene glycol complex,aluminum zirconium trichlorohydrate, aluminum zirconiumtetrachlorohydrate, aluminum zirconium pentatchlorohydrate, aluminumzirconium octachlorohydrate, aluminum zirconium trichlorohydrex glycinecomplex, aluminum zirconium tetrachlorohydrex glycine complex, aluminumzirconium pentachlorohydrex glycine complex, aluminum zirconiumoctachlorohydrex glycine complex, aluminum chloride, aluminum sulfatebuffered, and combinations thereof.